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River guide · New Mexico

Fly Fishing the San Juan River

The San Juan tailwater below Navajo Dam in northwestern New Mexico is one of the most famous big-fish trout fisheries in the country, with the 'Quality Waters' running roughly 3.75 miles downstream from the dam. Cold, stable, nutrient-rich releases produce enormous numbers of large, well-fed rainbow and brown trout in a desert canyon setting. The fishery is defined by midges (anglers routinely fish size 22–26 patterns on long, fine leaders), making it a proving ground for technical nymphing. Blue-winged Olives in the cooler months and a midsummer Pale Morning Dun emergence round out the dry-fly opportunities.

See fly shops ↓

The best time to fly fish the San Juan River is Year-round (a true four-season fishery). Key hatches include Midges, Blue, Pale Morning Dun, San Juan Worm. 19 fly shops near the San Juan River can outfit your trip.

Fly shops near the San Juan River

Shops and guides that fish the San Juan River. See all 20 New Mexico shops →

Float 'n Fish LLCAngler Management on the San JuanAbe's Motel & Fly ShopBorn N' Raised Guide Service on the San Juan RiverRainbow Lodge & Resolution Guide ServiceBlue Sky Fly Fishing Co.Majestic Enchantment Fly Fishing - On the San Juan River
7 fly shops shown

Species on this water

BassBonefishCarpPanfishPikeRedfishSalmonSaltwaterSteelheadStriperTarponTrout

Nearby towns

Navajo DamTurleyDurango

Rivers nearby

Gunnison RiverArkansas RiverCrystal RiverRoaring Fork River
Hatches & seasons

When & what to fish on the San Juan River

River typetailwater
Best seasonYear-round (a true four-season fishery)
AccessThe Quality Waters run roughly 3.75 miles below Navajo Dam, with the Texas Hole, Kiddie Pool, and other access lots along NM-173 plus wade trails.
Key hatches & timing
  • Midgeyear-round, dominant
  • Blue-winged OliveMar–Apr, Oct–Nov
  • Pale Morning DunJul–Aug
  • CaddisJun–Aug, evenings
  • Annelid / San Juan Wormyear-round subsurface staple
  • Ant / terrestrial falllate summer
From The Fly Bench

Tie the flies that work on the San Juan River

Step-by-step tying recipes & videos for these patterns.

Browse all 880+ patterns at The Fly Bench
Gear up

Gear up on the San Juan River

Everything you need before the next trip — rods, lines, leaders, and fly-tying materials.

Shop the gear Flies that work

The flies that work on the San Juan River

Find the most effective patterns for where you're fishing — and learn to tie them yourself, step by step.

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Updated June 2026